Vaillant ecoMAX 665 Installation And Maintenance Manual - page 34
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Installation and maintenance manual ecoMAX 665 / 0020020159_03
8 Troubleshooting
Code
Meaning
Display value/adjustable value
d.47
External temperature actual value
actual value in °C
d.50
Minimum speed offset
in r.p.m./10
d.51
Maximum speed offset
in r.p.m./10
d.52
Minimum air pressure offset
in Pa
d.53
Maximum air pressure offset
in Pa
d.60
Number of temperature limiting shutdowns
number
d.61
Safety thermostat shutdown
number
d.67
Remaining anti-cycle time heating
in minutes
d.68
No first start number
number of failed ignitions in the first attempt
d.69
No second start number
number of failed ignitions in the second attempt
d.71
Max. supply temperature heating
max. target value of the heating supply temperature:
adjustable value 40 - 85 °C (factory setting: 75 °C)
d.72
Pump over-run hot water
pump run-out time in seconds after the charging of a hot
water cylinder; factory setting: 80 s
d.75
Max. charging time hot water cylinder
maximum charging time for a cylinder without its own con-
troller
d.76
Appliance variants
1 - 19
d.77
Partial-load hot water cylinder
limitation of the storage charging output in kW
d.78
Max. flow temperature hot water
limitation of the storage charging temperature in °C
d.80
Operating hours heating
in h
d.81
Operating hours hot water generation
in h
d.82
Burner starts - heating
number of hystereses in the heating mode x 100
d.83
Burner starts - hot water mode
number of hystereses in the hot water mode x 100
d.87
Type of gas (natural gas/liquid gas)
not necessary, must stay at 0 = natural gas
d.90
Digital controller
1 = detected, 0 = not detected
d.91
Status DCF77
DCF status with connected external sensor with DCF77
receiver: 0 = no reception; 1 = reception;
2 = synchronised; 3 = valid
Table 8.2: Diagnosis codes
8.1.3 Error codes
The error codes displace all other displays when errors
occur.
An error that arises is shown in the display as “F...”, e.g.
“F.10” (see table on the next page).
The error code displayed is accompanied by a plain text
display, e.g. for F.10: “Short circuit supply sensor”.
If several errors occur simultaneously, the correspond-
ing error codes are displayed alternately for approx. 2
seconds each.
8.1.4 Error memory
The last 10 errors are saved in the appliance error
memory.
• Press the “i” and “–” keys simultaneously.
• You can scroll back through the error memory by
pressing the “+” key.
You can exit the error memory display as follows:
• Press the “i” key beneath the display
or
• do not press any key for about 4 minutes.
The current heating supply temperature appears in the
display again.